12 hours and 24 hours two kinds of display system, to meet the different people to see the time habit, more humane The time, date and temperature functions automatically rotate so that you always know the information you need. Sound 60 decibels to wake up the alarm screen The alarm clock automatically turn off the LED display after the time, date and temperature have been displayed for one round, and enter power saving mode. The alarm clock does not have any radiation Size:14.8 x 4.2 x 7cm Style: Casual Product Category: Clock Special Functions: Alarm, Calendar, Thermometer, Luminous, Lighting Display Type: Digital Color: Black Material: wood Power supply mode: 4 x AAA batteries (not included) Package Contents: 1 x alarm clock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.